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Dear Donnie,

  We are hosting Thanksgiving at my house this year & my sister is coming in from Boulder. She just text me that she's bringing her new boyfriend and wants him to stay at our house too. I can't count how many ways this is wrong!! I have 2 kids that will see her bringing this guy into her bedroom, I don't even know this guy and she want's me to let him stay here?? She's a grown woman, and I know she isn't saving herself but I don't excatly want it flaunted in everyones face. My parents live in a small apartment and don't have room for her to stay. She told me she can't afford a hotel room & won't come if i don't let her stay. She's holding me hostage. I only have 1 extra room and can't put stanger dude on my couch!! Help me?? What should I do??